1. A delivery-lag inventory model with an emergency provision;Barankin;Naval Research Logistics Quarterly,1961
2. Daniel KH. A delivery-lag inventory model with emergency. In: Scarf HE, Gilford DM, Shelly MW, editors. Multistage inventory models and techniques. Stanford University Press, Stanford, Ca., 1962 [Chapter 2].
3. An inventory model with optional time lag;Neuts;SIAM Journal of Applied Mathematics,1964
4. Some results concerning optimum inventory policies;Bulinskaya;Theory of Probability Applications,1964
5. Optimal policies for the inventory problem with negotiable leadtime;Fukuda;Management Science,1964